JPH0614248Y2 - Optical pickup attitude adjustment mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to an optical disc reproducing apparatus, and more particularly to an optical pickup attitude adjusting mechanism suitable for an optical disc reproducing apparatus in which a disc is set vertically.

[Prior Art] In an optical disk reproducing device such as a CD player, a laser beam is emitted from an optical pickup onto the optical disk, and laser light reflected from the optical disk is received by the optical pickup and converted into an electric signal.

Therefore, the optical axis of the optical pickup must be kept perpendicular to the optical disc.

Therefore, a conventional mechanism for adjusting the attitude of the optical pickup will be described with reference to FIGS. 5 and 7.

Reference numeral 1 shown in FIG. 5 (a) is an optical pickup body.

An optical pickup 1a is fixed to the optical pickup body 1 so as to face the optical disc, and a guide rod fitting hole 1b formed in the optical pickup body 1 in a cylindrical shape is fitted to a cylindrical guide rod to slide. It moves and is sent in the radial direction of the disc.

The optical pickup body 1 is fitted rotatably around the central axis of the guide rod, but the guide rod fitting hole 1b is provided.
A leaf spring 2 having the shape shown in FIG. 2B is fastened by a fastening screw 3 to the lower surface apart from the shaft 6 at the shaft mounting portion 2b of the leaf spring.
The roller 5 mounted via the contactor 7 and the contactor 7 provided on the contactor mounting portion 2a sandwich the guide rail to regulate the rotation angle.

That is, as shown in FIGS. 6A and 6B, the roller 5 and the contact 7 are arranged on opposite sides of the guide rail 8 formed by the chassis, and the posture of the optical pickup body 1 is maintained. There is.

As shown in FIG. 7, the attitude of the optical pickup body 1 is adjusted by rotating an adjusting screw 4 screwed with the optical pickup body 1 and moving the adjusting screw 4 up and down in the direction of the arrow shown in the drawing to bring the leaf spring 2 into contact with the adjusting screw 4. Is deformed and the relative position of the roller 5 with respect to the optical pickup body is moved in the direction of the arrow shown.

[Problems to be Solved by the Invention] However, in the conventional device described above, FIG.
When the distance between the roller 5 and the contactor 7 shown in FIG. 2 changes, and the height of the roller 5 rises, a gap is created between the roller 5 and the guide rail 8 and backlash occurs.

When the roller 5 is lowered, the guide rail 8 and the contact 7
The contact pressure between and becomes large and the optical pickup body 1
There was a drawback that it was difficult to feed smoothly.

The present invention was made in view of the above points,
It is an object of the present invention to provide an optical pickup attitude adjusting mechanism in which backlash does not occur between the guide rail and the contact of the optical pickup, and a smooth feed is achieved.

[Means for Solving the Problem] In the optical pickup attitude adjusting mechanism of the present invention, the guide rail is sandwiched between the first contactor and the second contactor provided on the leaf spring attached to the optical pickup body. In an optical pickup attitude adjusting mechanism for displacing and adjusting the leaf spring, the second contactor is provided at a tip end portion extending from the mounting position of the first contactor so as to bypass the guide rail. It is provided.

[Operation] According to the optical pickup attitude adjusting mechanism of the present invention, the force by which the first contactor and the second contactor hold the guide rail is given by the constant deformation of the leaf spring.

Therefore, the contact pressure between the contactor and the guide rail is always kept optimal, and smooth play is achieved without rattling.

[Embodiment] The first embodiment of the optical pickup attitude adjusting mechanism of the present invention
Description will be made with reference to FIGS.

In the figure, parts having the same functions as those shown in the conventional example are designated by the same reference numerals.

Reference numeral 1 shown in FIG. 1 (a) is an optical pickup body.

An optical pickup 1a is fixed to the optical pickup body 1 so as to face the optical disc, and a guide rod fitting hole 1b formed in the optical pickup body 1 in a cylindrical shape is fitted to a cylindrical guide rod to slide. It moves and is sent in the radial direction of the disc.

The optical pickup body 1 is fitted rotatably around the central axis of the guide rod, but the guide rod fitting hole 1b is provided.
A leaf spring 2 having the shape shown in FIG. 2B is fastened by a fastening screw 3 to the lower surface apart from the shaft 6 at the shaft mounting portion 2b of the leaf spring.
From the roller 5 mounted via the shaft mounting portion 2b to the U
Contact 7 provided on the contact attachment portion 2a extending in a letter shape
The angle of rotation is restricted by sandwiching the guide rail with.

That is, as shown in FIGS. 2A and 2B, the roller 5 and the contact 7 are arranged on opposite sides of the guide rail 8 formed by the chassis so that the posture of the optical pickup body 1 is maintained. There is.

As shown in FIG. 3, the adjustment of the posture of the optical pickup body is performed by adjusting screw 4 which is screwed onto optical pickup body 1.
Is performed by rotating and rotating it up and down in the direction of the arrow shown in the drawing to deform the leaf spring 2 that contacts the adjusting screw 4 and move the relative position of the roller 5 to the optical pickup body 1 in the direction of the arrow shown.

At this time, since the contactor 7 is displaced similarly to the roller 5, the distance m between the contactor 7 and the roller 5 is constant, the contact pressure between the contactor 7 and the guide rail is constant, and rattling does not occur.

The relationship between the relative positional relationship between the roller 5 and the optical pickup body 1 and the attitude of the optical pickup body 1 will be described with reference to FIG.

As shown in FIG. 4A, when the roller 5 is at the neutral displacement position with respect to the optical pickup body 1, the optical pickup body 1 is horizontal.

As shown in FIG. 4B, when the roller 5 is in the downward displacement position with respect to the optical pickup body 1, the optical pickup body 1 tilts to the left.

As shown in FIG. 4 (c), when the roller 5 is at the upper displacement position with respect to the optical pickup body 1, the optical pickup body 1 tilts to the right.

Although the embodiment is configured as described above, the invention is not limited to this. For example, the contact may be formed by press molding, or may be a small roller attached to a leaf spring.

[Advantage of Invention] According to the optical pickup attitude adjusting mechanism of this invention, the distance between the contactor and the roller does not change even if the leaf spring is deformed.
The contact pressure between the contact and the guide rail is always kept optimum, and smooth feed is achieved without rattling. Therefore, even when the disc is set vertically, good disc reproduction is possible.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 (a) is a perspective view showing an embodiment of the present invention, FIG. 1 (b) is a perspective view showing a part of the same embodiment, and FIG. 2 (a) is the same embodiment. An example front view, FIG. 2 (b) is a side view showing the same embodiment, FIG. 3 is a view showing the action in the same embodiment, and FIGS. 4 (a), (b) and (c) are FIG. 5 (a) is a perspective view showing a conventional example, FIG. 5 (b) is a perspective view showing a part of the conventional example, and FIG.
FIG. 6A is a front view showing the conventional example, FIG. 6B is a side view showing the conventional example, and FIG. 7 is a diagram showing an operation in the conventional example. 1 ... Optical pickup body, 1a ... Optical pickup, 1b ... Guide rod fitting hole, 2 ... Leaf spring, 2b
...... Shaft mounting part, 2a ...... Contact mounting part, 3 ... Tightening screw, 4 ... Adjusting screw, 5 ... Roller, 6 ... Shaft, 7 ...
… Contacts, 8 …… Guide rails.

Claims (1)

[Scope of utility model registration request] 1. An optical pickup attitude adjusting mechanism for adjusting a leaf spring attached to an optical pickup body by sandwiching a guide rail with a first contactor and a second contactor and displacing the leaf spring. In the optical pickup attitude adjusting mechanism, the second contactor is provided at a tip end portion of the leaf spring extending from the mounting position of the first contactor so as to bypass the guide rail. .